Operating device for elevator-doors.



No. 676,833. atented June I8, I90l.

H. BITNEB. OPERATING DEVHJE FUR ELEVATOR HOURS.

(Application filed Sept. 20, 1900.) (No Model.) 2 Sheets-:Sheet I.

No. 676,833. Patented lune l8, 190i.

H. BITNER.

OPERATING DEVICE FOR ELEVATOR DOORS.

(Application filed Sept; 20, 1900. (No Model.) 2 Shgets$heet 2.

E 5 Q Q "Ill" imll in-I lnuaniulnwInlniranim UNITED STATES Patient HARRYBITNER, or BERWYN, ILLINOIS.

OPERATING DEVICE FC JR ELEVATOR-DOORS.

' SPECIFICATION forming part of Letters Patent No. 676,833, dated June18, 1901 Application filed September 20, 1900. Serial No. 30,577. (Nomodel.)

To ctZZ whom it may concern:

Be it known that I, HARRY BITNER, a citizen of the United States ofAmerica, residing at Berwyn, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in OperatingDevices for Elevator-Doors, of which the following is a specification.

My invention relates to certain improvements in operating devices forelevator-doors, the purpose of which is to provide means forautomatically opening and closing said doors at the will of the elevatoroperator and without any effort on his part, except such as may benecessary to set the automatic devices into operation.

The object of the invention is great simplicity, ease of operation, andcheapness of manufacture, and the invention consists in certain novelcharacteristics to be fully described and pointed out below.

In the drawings, Figure l is an elevation looking from the inside of anelevator-well at the upper portion of one of the doors and showing thedoor in its closed position. Fig. 2 is a similar View showing the doorpartly open. Fig. 3 is a plan of the top of the door, showing thetransom cut away in the line 3 3 of Fig. 1. Fig. is a perspective of afriction-plate to be attached to the top of the door. Fig. 5 is avertical transverse section in line 5 5 of Fig. 2 looking in thedirection of the arrow 5. Fig. 6 is a perspective of a tilting lever.Fig. 7 is a horizontal section in line 7 7 of Fig. 2. Fig. 8 is avertical section in line 8 S of Fig. 5 looking in the direction of thearrow 8. Fig. 9 is a similar section showing the parts in a differentposition. Fig. 10 is a View similar to Figs. 1 and 2, showing the dooropen and certain additional parts; and Fig. 11 is a vertical section inline 11 ll of Fig. 10 looking in the direction of the arrow 11.

Referring to the drawings, A is-the framework of an elevator-inclosure;B, a track secured thereto; 0, door-hangers running on the track, and Da door carried by said hangers. A friction-plate E is secured to theinside of the top of the door and has inwardlyprojecting flanges alongportions of the top and bottom 0 c to form friction-tracks and is alsocut away in the center, so as to aiford other friction-tracks o 0 actingas continuations of the flanges, but not in the same horizontal plane,being nearer the center line of the friction-plate. Near the ends of theplate recesses c o are out below the surface of the tracks 0 c casingoverhanging the doorhangers and having pivoted to it inside of thelatter an angle-lever F, which is pivoted to the inside of the bracketand has one endf extending through the same. Said end is turned in wardat f to extend into the elevator-well beyond the adjacent parts andafford means of engagement for actuating devices to be carried by theelevator-car. A spring f secured to the lever and bearing upon thebracket, tends to hold the lever as shown in Fig. 1. In the other end, fof the lever is journaled a short shaft G, carrying at the end adjacentto the door a double pulley g, having a portion g of greater diameterand a portion g of less diameter, the portion of greater diameter beingadapted to engage the inwardly-projecting flanges upon the frictionplateand the part of less diameter to travel in the opening in the middle ofthe plate and engage the friction-tracks 0 0 The opposite end of theshort shaft has fast upon it a pulley H, around which runs aconstantlymoving cable I, preferably running downward, as shown by thearrows, and returning through any convenient passage or through anadjacent well and operating another series of doors, if desired.

Fig. 1 shows the door shut and the double pulley 9 out of contact withthe friction-plate and running freely Without affecting the door.

If, however, the lever F be thrown as seen in Fig. 2, the pulley g willbe raised until the larger portion strikes the upper flange 0, when thefriction thereon draws upon the door and opens the latter. tion of thepulley runs off of the flange the smaller engages the track 0 and checksthe motion of the door at the same time, tending to move it onward atareduced rate until the recess 0 is reached, when the door is left inthe open position and the friction pulley again runs freely out ofcontact with the friction-plate. If the lever F be now permitted toreturn into the position seen in Fig. 1, to which position it is urgedboth by the spring A bracket E is secured to the As the larger por- IOOf and by the traction of the cable I, the movement into this positionbrings the larger portion g of the pulley 9 into contact with the lowerflange c of the friction-plate and 5 starts the door toward the closedposition,

I5 jj, by means of which it may be thrown into or out of position toengage the lever F, the upper part of the shoe being inclined away fromsaid lever, so that the shoe may be thrown before it reaches the leverand the latter may ride up the inclined portion. A corresponding inclineis afforded by the link j. An arm j upon the link j is connected by arod j to a lever K, pivoted to a bracket 70, fast to the car and havingupon its opposite end a rod 7;, extending up through the car-floor andterminating in a button 70*". A spring 75 tends to draw downward uponthe rod j, said spring bearing upon a block 70, secured to the car. Thespring tends to hold the shoe out of line with the lever F and isovercome by the pressure of the foot upon the button to throw said shoeinto position to operate the lever. 1 do not consider this a ctuatingdevice as material to my invention and show it only as one means ofoperating the lever F.

I believe the invention herein shown to be independent of the variousdetails, and therefore do not intend to limit it to the specificconstruction shown and described.

. I claim as new and desire to secure by Letters Patent 1. Thecombination withareciprocable door and a supporting-framework, of asuitablydriven double pulley parallel with the doors and provided withtwo cylindrical faces of different diameters, suitable friction devicesfor engagement with said faces to open and shut the door and means forbringing about the engagement between the pulley and said devices;substantially as described.

2. The combination with the inclosure of an elevator-well and a seriesof reciprocable doors supported thereby, of a driven cable extendingfrom top to bottom of the Well, a suitably-supported pulley rotated bysaid cable 3. The combination with a reciprocable door andsupporting-framework, of a tilta-ble lever mounted upon a horizontalpivot adjacent to said door, a vertical friction-pulley mounted uponsaid lever and moved vertically thereby, said pulley having two faces ofdifferent diameters and friction-tracks secured to the door above andbelow said pulley to engage said faces, whereby the tilting of the leverbrings about engagement with either of said tracks; substantially asdescribed.

4. The combination with a horizontallyslidable door and asupporting-framework, of a vertical friction-plate secured to the top ofthe door and having two series of tracks arranged one above the other, abracket secured to the framework, a lever pivoted to the bracket and asuitably-driven double pulley having two faces of difierent diametersadapted respectively for engagement with the respective members of eachseries of tracks and means for oscillating the lever upon its pivot tomake alternate engagement with the upper and lower tracks; substantiallyas described.

In witness whereof I have hereunto set my hand at Chicago, in the countyof Cook and State of Illinois, this 18th day of September, A. D. 1900.

HARRY BITNER.

Witnesses:

CHAS. O. Sunnvnv, S. Buss.

